PAIN RELIEF CREAMS:
As a 47 year old practicing yoga, I have come to learn of two MIRACLE joint and muscle pain relief creams I highly recommend!
The first one is topical MSM Cream, sold by Puritan's Pride, primarily for chronic (arthritic) pain but also great for temporary joint pain relief. http://www.puritan.com/
The second one is a menthol penetrating MUSCLE AND JOINT pain relief cream (similar but far superior to Ben Gay) called "Jivamukti China Gel" (Therapeutic Gel) and can be purchased in the online shopping area of their website. It acts fast and can be applied to trouble spots BEFORE yoga class, so it acts during the class and you feel like new by the time your class is finished! http://www.jivamuktiyoga.com/boutique/index.html
Enjoy! - Alex